OSS Robot

Install packages

apt-get install lvm2 dmsetup mdadm reiserfsprogs xfsprogs

Create partitions

fdisk /dev/sda

-create new partition (’n')
-change system partition type to lvm (’t')
-enter ‘8e’ for hex partition type
-write partition table to disk (’w')

Create physical volume

root@backupserv:~# pvcreate /dev/sdb1 /dev/sda2 /dev/sdc1
Can’t open /dev/sdb1 exclusively.  Mounted filesystem?
Wiping software RAID md superblock on /dev/sda2
Physical volume “/dev/sda2″ successfully created
Wiping software RAID md superblock on /dev/sdc1
Physical volume “/dev/sdc1″ successfully created

root@backupserv:~# pvdisplay
“/dev/sda2″ is a new physical volume of “903.57 GB”
— NEW Physical volume —
PV Name               /dev/sda2
VG Name
PV Size               903.57 GB
Allocatable           NO
PE Size (KByte)       0
Total PE              0
Free PE               0
Allocated PE          0
PV UUID               zsP1EO-SlwB-nryo-gEP7-fInc-hJc4-ytVpLX

“/dev/sdc1″ is a new physical volume of “931.51 GB”
— NEW Physical volume —
PV Name               /dev/sdc1
VG Name
PV Size               931.51 GB
Allocatable           NO
PE Size (KByte)       0
Total PE              0
Free PE               0
Allocated PE          0
PV UUID               V3RZ2b-FBsM-HoI6-aQED-ouu9-LpR1-m02VLO

Create a Volume Group
root@backupserv:~# vgcreate data /dev/sdc1 /dev/sda2
Volume group “data” successfully created

root@backupserv:~# vgdisplay
— Volume group —
VG Name               data
System ID
Format                lvm2
Metadata Areas        2
Metadata Sequence No  1
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                0
Open LV               0
Max PV                0
Cur PV                2
Act PV                2
VG Size               1.79 TB
PE Size               4.00 MB
Total PE              469780
Alloc PE / Size       0 / 0
Free  PE / Size       469780 / 1.79 TB
VG UUID               XJVXrA-m5xO-GARp-6WT0-JFlX-7ARj-jxJChV

root@backupserv:~# vgscan
Reading all physical volumes.  This may take a while…
Found volume group “data” using metadata type lvm2fdisk /dev/sda

Create Logical Volume

root@backupserv:~# lvcreate –name share1 –size 100G data
Logical volume “share1″ created
root@backupserv:~# lvcreate –name share2 –size 500G data
Logical volume “share2″ created

*run lvscan for new logical volume scan.

Format partition

root@backupserv:~# mkfs.ext3 /dev/data/share1
mke2fs 1.41.9 (22-Aug-2009)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
6553600 inodes, 26214400 blocks
1310720 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
800 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: 192/800

Mount device

root@backupserv:~# mkdir /mnt/share2
root@backupserv:~# mount /dev/data/share2 /mnt/share2
/dev/mapper/data-share2
516061624    202652 489644572   1% /mnt/share2

Deleting an Volume Group

root@backupserv:~# vgremove data
Do you really want to remove volume group “data” containing 2 logical volumes? [y/n]: yes
Can’t remove open logical volume “share1″
root@backupserv:~# umount /mnt/share*
root@backupserv:~# vgremove data
Do you really want to remove volume group “data” containing 2 logical volumes? [y/n]: yes
Do you really want to remove active logical volume “share1″? [y/n]: yes
Logical volume “share1″ successfully removed
Do you really want to remove active logical volume “share2″? [y/n]: yes
Logical volume “share2″ successfully removed
Volume group “data” successfully removed

Delete Physical Volume

root@backupserv:~# pvremove /dev/sdc1 /dev/sdb1
Labels on physical volume “/dev/sdc1″ successfully wiped
Physical Volume /dev/sdb1 not found

ref: http://www.howtoforge.com/linux_lvm_p2

Adding Additional Disk to LVM

create fdisk LVM partition first….

root@backupserv:~# pvcreate /dev/sdb1
Physical volume “/dev/sdb1″ successfully created

root@backupserv:~# vgextend vol1 /dev/sdb1
Volume group “vol1″ successfully extended
root@backupserv:~# vgdisplay vol1
— Volume group —
VG Name               vol1
System ID
Format                lvm2
Metadata Areas        3
Metadata Sequence No  5
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                1
Open LV               1
Max PV                0
Cur PV                3
Act PV                3
VG Size               2.70 TB
PE Size               4.00 MB
Total PE              708246
Alloc PE / Size       469238 / 1.79 TB
Free  PE / Size       239008 / 933.62 GB
VG UUID               RS2K3i-SOJ8-a230-fcQL-8PX0-Bpuj-qSUYKz

root@backupserv:~# lvextend -L +930G /dev/vol1/data1 /dev/sdb1
Extending logical volume data1 to 2.70 TB
Logical volume data1 successfully resized

root@backupserv:~# resize2fs /dev/vol1/data1
resize2fs 1.41.9 (22-Aug-2009)
Filesystem at /dev/vol1/data1 is mounted on /mnt/data; on-line resizing required
old desc_blocks = 115, new_desc_blocks = 173
….

*watch more space become available with ‘watch df -h’

Linux, Raid, Uncategorized